Breast pump



FIG. 1 is a front elevational view of a breast pump embodying my newdesign;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof; and,

FIG. 6 is a side elevational view of the other side thereof.

The ornamental design for a breast pump, as shown and described.